Issues and Pull Requests tabs display as inactive/greyed out (experimental mode)

### Describe the bug

I'm using github copilot cli with `experimental mode` enabled. I see the `Issues` and `Pull Requests` tabs in the interface but they are always greyed out regardless of the status of the current repo and branch. Here are details that might help:

* Copilot CLI version: 1.0.68
* Platform: Ubuntu (within WSL)
* Experimental mode: enabled
* gh  CLI working: yes (issues and PRs listed successfully)
* Tabs configuration: enabled
* 2 github accounts configured (personal and work). Git and SSH have been configured to work with each separately:
```ini
# ~/.gitconfig
[url "git@github.com:"]
insteadOf = "https://github.com"

[url "work-ssh-alias:work-gh-org/"]
insteadOf = git@github.com:work-gh-org/
```
```ssh-config
# ~/.ssh/config
Host work-ssh-alias
User git
HostName github.com
IdentityFile ~/.ssh/id_ed25519_work_key
```
* `gh` cli is always be setup to auth against the correct account when working within a repo and works as expected when listing issues and PRs

### Affected version

GitHub Copilot CLI 1.0.68.

### Steps to reproduce the behavior

_No response_

### Expected behavior

I expect to see the Issues and PRs tabs active when copilot is within a github repo.

### Additional context

Additional context generated via copilot-cli when attempting to debug the issue:

----

Environment:

• Copilot CLI version: 1.0.68
• Platform: Linux
• Experimental mode: enabled

Issue:
The Issues and Pull Requests tabs display as inactive (greyed out) in the experimental tabbed interface, despite the feature being properly configured and functional.

Verification Steps Completed:

• ✅ Tabs are enabled in  ~/.copilot/settings.json  ( "enabled": true )
• ✅ Running Copilot CLI inside a valid Git repository with remote on GitHub
• ✅  gh  CLI is authenticated and can successfully list issues:  gh issue list -R /  returns open issues
• ✅  gh  CLI can successfully list pull requests:  gh pr list -R /  returns open pull requests
• ✅ Correct GitHub account is set as active with appropriate token scopes ( repo ,  read:org ,  workflow )
• ✅ Restarting the Copilot CLI session does not resolve the issue

Expected Behavior:
The Issues and Pull Requests tabs should be active and allow browsing repository issues and PRs, as documented in the Copilot CLI help.

Actual Behavior:
The tabs remain inactive/greyed out and appear non-functional, even though the underlying  gh  CLI infrastructure is working correctly and can retrieve the data that would populate these tabs.

Bắt đầu với ~/.copilot/settings.json và tái hiện giao diện dạng tab thử nghiệm bên trong một GitHub repository; xác minh các lệnh `gh issue list` và `gh pr list` được báo cáo với repository và tài khoản hiện tại. Payload không nêu tên tệp nguồn hay bài kiểm thử nào, vì vậy hãy lần theo điểm vào CLI kiểm soát khả dụng của các tab và xác nhận rằng các tab trở nên hoạt động trong một repository hợp lệ.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.